moulded case circuit breaker.GAS1 series moulded case circuitbreaker is a new type breaker which is applied with ratedinsulating voltage 800v ,rated working voltage 690v ans used forinfrequent exchange ans starup in AC60hz condition.the mccb is ofprotecting function in overloading ,shout-circuit,and under voltagesituation to protect circuit system and power device fromdamage.and our website is www.gacia.com.cn  /   simon04011(at)hotmail.com